I second this. I can't relate the the part about a sense of security, but I've found that it's very important to "take care of myself", in whatever form. For me that often means cleaning my apartment, taking care of business I've been procrastinating on, etc. Those are concrete, actionable tasks that are guaranteed to make me feel better, even if only a little bit. At work, I similarly try to focus on specific small tasks if possible, to keep my mind off of things.